id	summary	reporter	owner	description	type	status	milestone	component	version	severity	resolution	keywords	cc
13050	Serialization Fails on Optional Vector	cristall@…	Robert Ramey	"
When serializing a boost::optional with T = std::vector, it will fail to load.  This is a regression in Boost 1.64 as 1.63 does not appear to exhibit the issue.

The following code will exhibit the issue:
{{{
boost::optional<std::vector<std::uint8_t>> opt{};
std::string in_str{ ""22 serialization::archive 15 0 0 1 0 4 0 0 1 2 3"" };
std::istringstream iss{in_str};
boost::archive::text_iarchive ia{iss};
ia >> opt;
}}}

This should set opt to a valid optional containing a vector of {0, 1, 2, 3}.  However it will instead either segfault or enter an infinite loop.

The cause appears to be related to a change in boost/serialization/optional.hpp, where stack storage was changed from using detail::stack_construct to detail::stack_allocate.  The error appears to come from trying to use an undefined vector object.

This was only tested on OSX using the following:
{{{
Apple LLVM version 8.1.0 (clang-802.0.42)
Target: x86_64-apple-darwin16.6.0
Thread model: posix
}}}"	Bugs	closed	To Be Determined	serialization	Boost 1.64.0	Regression	fixed